Matches in SemOpenAlex for { <https://semopenalex.org/work/W2810345025> ?p ?o ?g. }
- W2810345025 abstract "We show that the recently observed superconductivity in twisted bilayer graphene (TBG) can be explained as a consequence of the Kohn-Luttinger (KL) instability which leads to an effective attraction between electrons with originally repulsive interaction. Usually, the KL instability takes place at extremely low energy scales, but in TBG, a doubling and subsequent strong coupling of the van Hove singularities (vHS) in the electronic spectrum occurs as the magic angle is approached, leading to extended saddle points in the highest valence band with almost perfect nesting between states belonging to different valleys. The highly anisotropic screening induces an effective attraction in a $p$-wave channel with odd parity under the exchange of the two disjoined patches of the Fermi line. We also predict the appearance of a spin-density wave instability, adjacent to the superconducting phase, and the opening of a gap in the electronic spectrum from the condensation of spins with wave vector corresponding to the nesting vector close to the vHS." @default.
- W2810345025 created "2018-07-10" @default.
- W2810345025 creator A5015027571 @default.
- W2810345025 creator A5048201324 @default.
- W2810345025 date "2019-01-18" @default.
- W2810345025 modified "2023-10-11" @default.
- W2810345025 title "Kohn-Luttinger Superconductivity in Twisted Bilayer Graphene" @default.
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- W2810345025 doi "https://doi.org/10.1103/physrevlett.122.026801" @default.
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